CTest: Mark DART_TESTING_TIMEOUT as advanced (#10150)

Also, split a long line into two. And alphabetize the
variables mentioned in the mark_as_advanced call.

Modules/CTest.cmake

@@ -63,7 +63,8 @@ OPTION(BUILD_TESTING "Build the testing tree." ON)
 # function to turn generator name into a version string
 # like vs7 vs71 vs8 vs9 
 FUNCTION(GET_VS_VERSION_STRING generator var)
-  STRING(REGEX REPLACE "Visual Studio ([0-9][0-9]?)($|.*)" "\\1" NUMBER "${generator}") 
+  STRING(REGEX REPLACE "Visual Studio ([0-9][0-9]?)($|.*)" "\\1"
+    NUMBER "${generator}")
   IF("${generator}" MATCHES "Visual Studio 7 .NET 2003")
     SET(ver_string "vs71")
   ELSE("${generator}" MATCHES "Visual Studio 7 .NET 2003")
@@ -253,15 +254,16 @@ IF(BUILD_TESTING)
   ENDIF(CTEST_USE_LAUNCHERS)
 
   MARK_AS_ADVANCED(
-    COVERAGE_COMMAND
-    CVSCOMMAND
-    SVNCOMMAND
     BZRCOMMAND
-    HGCOMMAND
-    GITCOMMAND
-    CVS_UPDATE_OPTIONS
-    SVN_UPDATE_OPTIONS
     BZR_UPDATE_OPTIONS
+    COVERAGE_COMMAND
+    CTEST_SUBMIT_RETRY_DELAY
+    CTEST_SUBMIT_RETRY_COUNT
+    CVSCOMMAND
+    CVS_UPDATE_OPTIONS
+    DART_TESTING_TIMEOUT
+    GITCOMMAND
+    HGCOMMAND
     MAKECOMMAND 
     MEMORYCHECK_COMMAND
     MEMORYCHECK_SUPPRESSIONS_FILE
@@ -270,10 +272,9 @@ IF(BUILD_TESTING)
     SLURM_SBATCH_COMMAND
     SLURM_SRUN_COMMAND
     SITE
-    CTEST_SUBMIT_RETRY_DELAY
-    CTEST_SUBMIT_RETRY_COUNT
+    SVNCOMMAND
+    SVN_UPDATE_OPTIONS
     )
-  #  BUILDNAME 
   IF(NOT RUN_FROM_DART)
     SET(RUN_FROM_CTEST_OR_DART 1)
     INCLUDE(CTestTargets)